Use getoptions, which accepts a
plot handle and returns a plot options handle.

p = getoptions(h)

Create a default plot options handle using one of
the following commands:

bodeoptions — Bode plots

hsvoptions — Hankel singular
values plots

nicholsoptions — Nichols
plots

nyquistoptions — Nyquist
plots

pzoptions — Pole/zero plots

sigmaoptions — Sigma plots

timeoptions — Time plots
(step, initial, impulse, etc.)

For example,

p = bodeoptions

returns a plot options handle for Bode plots.

setoptions(h, 'Property1', 'value1', ...) assigns
values to property pairs instead of using PlotOpts.
To find out what properties and values are available for a particular
plot, type help <function>options.
For example, for Bode plots type